do not write to stdout for --machinereadable, fixes getgauge/gauge-vscode#431 
do not write to stdout for --machinereadable, fixes getgauge/gauge-vscode#431 

Signed-off-by: sriv <65b0fe9e2897ee021ca8630a99a42376d4b8ffa5@gmail.com>
getgauge/gauge,getgauge/gauge,getgauge/gauge,getgauge/gauge,getgauge/gauge